(b) Lessee shall fail to obtain and maintain any insurance required under the provisions of Section 12 hereof, or shall let any such insurance coverage lapse, or shall operate the Aircraft outside of the scope of the insurance coverage maintained with respect to the Aircraft;



 (c) any representation or warranty made by Lessee in Sections 5(c)(i) through 5(c)(vi) hereof inclusive is incorrect at the time given in any material respect; any other representation or warranty made by Lessee herein or in any document or certificate furnished to Lessor in connection herewith or therewith or pursuant hereto is incorrect in any material respect at any time during the Term and the Lessee fails to cure the same so as to make the representation or warranty correct within thirty (30) days after Lessee has actual notice thereof;



 (d) Lessee shall fail to perform or observe any other covenant, condition or agreement to be performed or observed by it pursuant to this Lease and such failure shall continue for a period of thirty (30) days after notice thereof is given by Lessor to Lessee, or if Lessee shall fail to observe its covenant to keep the Aircraft free and clear of Liens, fifteen (15) days after the date of imposition of any such Lien;